Expressive Code

example.js

var a = [{
  name:'fluffy', 
  age: 23,
  run: function() {
    // does something
  }
}, {
  name:'gunny', 
  age: 31,
  run: function() {
    // does something
  }
}];

// Not very expressive
for(var i = 0, len = a.length; i < len; i++) {
  if(a[i].name === 'gunny') {
    a[i].run();
  }
}

// More expressive 
a.forEach(function(animal) {
  if(animal.name === 'gunny') {
    animal.run();
  }
});